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Thank you Joachim and Hui. -rankmap {rank map} comma separated rank to node id list How is the format if I have 4 processes ? mpirun -prepend-rank -n 5 -hosts 192. 168. 2. 100,192. 168. 2. 200 hello-world How do I add rankmap to the above? Just add
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<p class="MsoNormal"><span style="font-size:11.0pt">Thank you Joachim and Hui.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#2D3540;background:white">-rankmap {rank map} comma separated rank to node id list</span><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#2D3540"><br>
<br>
<span style="background:white">How is the format if I have 4 processes ?</span><br>
<br>
<span style="background:white">mpirun -prepend-rank -n 5 -hosts 192.168.2.100,192.168.2.200 hello-world<o:p></o:p></span></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#2D3540;background:white"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#2D3540;background:white">How do I add rankmap to the above? Just add ranks 0,1,2,3 after –rankmap?</span><span style="font-size:10.5pt;font-family:"Arial",sans-serif;color:#2D3540"><br>
<br>
<br>
<br>
<span style="background:white">Secondly, can I pin each of these 5 processes to a particular core?</span><br>
<br>
<span style="background:white">Could you give an example of the “user” option?</span><br>
<br>
<span style="background:white">user:0+2,1+4,3,2 -- user specified binding</span><br>
<br>
<br>
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<span style="background:white">does the above mean rank 0 will run on 2?</span></span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="color:black">From:
</span></b><span style="color:black">Zhou, Hui <zhouh@anl.gov><br>
<b>Date: </b>Monday, July 1, 2024 at 3:10</span><span style="font-family:"Arial",sans-serif;color:black"> </span><span style="color:black">PM<br>
<b>To: </b>discuss@mpich.org <discuss@mpich.org>, Jenke, Joachim <jenke@itc.rwth-aachen.de><br>
<b>Cc: </b>Niyaz Murshed <Niyaz.Murshed@arm.com>, nd <nd@arm.com><br>
<b>Subject: </b>Re: Custom rank for processes<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">>What Joachim points out is that you can set a rank of 2, 3, 20, 30 if your total number of processes is 4.<br>
<br>
Of course, I meant for "can't".<br>
<br>
Here are some additional pointers:<br>
* The PR adding the rankmap option: <a href="https://urldefense.us/v3/__https://github.com/pmodels/mpich/pull/6213__;!!G_uCfscf7eWS!aPnbBzYUN52PM6-sRCWAUZUrcgQItHhVgf4fNwl1F_Y9U4JgKyox4xxb6Gn5UnQ3eOBbZxJLrhjxJlSBAfE$">
https://github.com/pmodels/mpich/pull/6213</a><br>
* Other options for specifying rank ordering and binding:<a href="https://urldefense.us/v3/__https://github.com/pmodels/mpich/blob/main/doc/wiki/how_to/Using_the_Hydra_Process_Manager.md__;!!G_uCfscf7eWS!aPnbBzYUN52PM6-sRCWAUZUrcgQItHhVgf4fNwl1F_Y9U4JgKyox4xxb6Gn5UnQ3eOBbZxJLrhjxZg0xIV8$">https://github.com/pmodels/mpich/blob/main/doc/wiki/how_to/Using_the_Hydra_Process_Manager.md</a><br>
<br>
Hui<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"> Zhou, Hui <zhouh@anl.gov><br>
<b>Sent:</b> Monday, July 1, 2024 3:04 PM<br>
<b>To:</b> discuss@mpich.org <discuss@mpich.org>; Jenke, Joachim <jenke@itc.rwth-aachen.de><br>
<b>Cc:</b> Niyaz Murshed <Niyaz.Murshed@arm.com>; nd <nd@arm.com><br>
<b>Subject:</b> Re: Custom rank for processes</span> <o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><span style="color:black">Hi Niyaz,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Yes, you can use the </span><code><span style="font-size:10.0pt;color:black">-rankmap</span></code><span style="font-family:"Arial",sans-serif;color:black"></span><span style="color:black"> option to specify a
full rank ordering. The syntax for rankmap string is:<br>
<br>
```<br>
/* rankmap string format (used in PMI_process_mapping) in ABNF:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"> *<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"> * mapping = '(' format ',' (block / block_repeats) *[',' (block / block_repeats)] ')'<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"> * format = 'vector'<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"> * block = num / '(' num ',' num ',' num ')'<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"> * block_repeats = '[' block *[',' block] ']x' num<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"> * num = 1*DIGIT<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"> *<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"> * If a block is in 3-tuple of (X,Y,Z), the meaning is:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"> * X - node id start value<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"> * Y - number of nodes with size Z<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"> * Z - number of processes assigned to each node<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"> *<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"> * If a block is a single number id, it denotes the node id, which is equivallen to<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"> * (id, 1, 1).<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"> *<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"> * A block_repeat repeats the bracketed block list by num of times.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"> */<br>
```<br>
<br>
What Joachim points out is that you can set a rank of 2, 3, 20, 30 if your total number of processes is 4. You can only order the processes.<br>
<br>
Hope that helps.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="color:black">--<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Hui<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"> Niyaz Murshed via discuss <discuss@mpich.org><br>
<b>Sent:</b> Monday, July 1, 2024 2:43 PM<br>
<b>To:</b> discuss@mpich.org <discuss@mpich.org>; Jenke, Joachim <jenke@itc.rwth-aachen.de><br>
<b>Cc:</b> Niyaz Murshed <Niyaz.Murshed@arm.com>; nd <nd@arm.com><br>
<b>Subject:</b> Re: [mpich-discuss] Custom rank for processes</span> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-line-height-alt:.75pt"><span style="font-size:1.0pt;color:white">Am actually trying to understand how/if I can pin a rank to a process .. also pin a core to a process. From: Niyaz Murshed via discuss <discuss@</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">mpich.</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">org>
Date: Monday, July 1, 2024 at 2:</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">34 PM To: Jenke, Joachim <jenke@</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">itc.</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">rwth-aachen.</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">de>,
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<p class="xxmsonormal"><span style="font-size:11.0pt">Am actually trying to understand how/if I can pin a rank to a process .. also pin a core to a process.</span><o:p></o:p></p>
<p class="xxmsonormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
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<p class="xxmsonormal" style="margin-bottom:12.0pt"><b><span style="color:black">From:
</span></b><span style="color:black">Niyaz Murshed via discuss <discuss@mpich.org><br>
<b>Date: </b>Monday, July 1, 2024 at 2:34</span><span style="font-family:"Arial",sans-serif;color:black"> </span><span style="color:black">PM<br>
<b>To: </b>Jenke, Joachim <jenke@itc.rwth-aachen.de>, discuss@mpich.org <discuss@mpich.org><br>
<b>Cc: </b>Niyaz Murshed <Niyaz.Murshed@arm.com>, nd <nd@arm.com><br>
<b>Subject: </b>Re: [mpich-discuss] Custom rank for processes</span><o:p></o:p></p>
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<p class="xxmsonormal"><span style="font-size:1.0pt;color:white">What is the rankmap used for ? From: Jenke, Joachim <jenke@</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">itc.</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">rwth-aachen.</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">de>
Sent: Monday, July 1, 2024 2:</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">21:</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">53
PM To: discuss@</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">mpich.</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">org
<discuss@</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">mpich.</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">org>
Cc: Niyaz Murshed <Niyaz.</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">Murshed@</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">arm.</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">com>;
nd <nd@</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">arm.</span><span style="font-size:1.0pt;font-family:"Arial",sans-serif;color:white"> </span><span style="font-size:1.0pt;color:white">com>
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<p class="xxmsonormal">What is the rankmap used for ? <o:p></o:p></p>
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<p class="xxmsonormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"> Jenke, Joachim <jenke@itc.rwth-aachen.de><br>
<b>Sent:</b> Monday, July 1, 2024 2:21:53 PM<br>
<b>To:</b> discuss@mpich.org <discuss@mpich.org><br>
<b>Cc:</b> Niyaz Murshed <Niyaz.Murshed@arm.com>; nd <nd@arm.com><br>
<b>Subject:</b> Re: Custom rank for processes</span> <o:p></o:p></p>
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<p class="xxmsonormal"> <o:p></o:p></p>
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<p class="xxmsonormal">MPI defines rank numbers to be consecutive from 0 to size-1. Your suggested numbering will not work.<o:p></o:p></p>
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<p class="xxmsonormal">-Joachim <o:p></o:p></p>
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<b>Sent:</b> Monday, July 1, 2024 9:09:41 PM<br>
<b>To:</b> discuss@mpich.org <discuss@mpich.org><br>
<b>Cc:</b> Niyaz Murshed <Niyaz.Murshed@arm.com>; nd <nd@arm.com><br>
<b>Subject:</b> [mpich-discuss] Custom rank for processes</span> <o:p></o:p></p>
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<p class="xxmsonormal"> <o:p></o:p></p>
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<p class="xxmsonormal"><span style="font-size:1.0pt;color:white">Hello, Is it possible to provide custom ranks to processes ? I see a param called “-rankmap” .. Does it provide this option? Is it possible to do something like below : Node1 => 2 processes =>
rank 2,3 Node2 => 2 processes => rank </span><o:p></o:p></p>
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<p class="xxxxmsonormal">Hello, <o:p></o:p></p>
<p class="xxxxmsonormal">Is it possible to provide custom ranks to processes ?<o:p></o:p></p>
<p class="xxxxmsonormal">I see a param called “-rankmap” .. Does it provide this option?<o:p></o:p></p>
<p class="xxxxmsonormal"> <o:p></o:p></p>
<p class="xxxxmsonormal">Is it possible to do something like below :<o:p></o:p></p>
<p class="xxxxmsonormal">Node1 => 2 processes => rank 2,3<o:p></o:p></p>
<p class="xxxxmsonormal">Node2 => 2 processes => rank 20,30<o:p></o:p></p>
<p class="xxxxmsonormal"> <o:p></o:p></p>
<p class="xxxxmsonormal">Thanks.<o:p></o:p></p>
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